For thousands of years, nomadic herdsmen have roamed the harsh, semi-arid lowlands that stretch across 80 percent of Kenya and 60 percent of Ethiopia. Descendants of the oldest tribal societies in the world, they survive thanks to the animals they raise and the crops they grow, their travels determined by the search for water and grazing lands.

These herdsmen have long been accustomed to adapting to a changing environment. But in recent years, they have faced challenges unlike any in living memory: As temperatures in the region have risen and water supplies have dwindled, the pastoralists have had to range more widely in search of suitable water and land. That search has brought tribal groups in Ethiopia and Kenya in increasing conflict, as pastoral communities kill each other over water and grass.

When the Water Ends, a 16-minute video produced by Yale Environment 360 in collaboration with MediaStorm, tells the story of this conflict and of the increasingly dire drought conditions facing parts of East Africa. To report this video, Evan Abramson, a 32-year-old photographer and videographer, spent two months in the region early this year, living among the herding communities. He returned with a tale that many climate scientists say will be increasingly common in the 21st century and beyond how worsening drought in parts of Africa, the Middle East, and elsewhere will pit group against group, nation against nation. As one UN official told Abramson, the clashes between Kenyan and Ethiopian pastoralists represent some of the world’s first climate-change conflicts...."